Diane Lane and Josh Brolin arrives at the "The Guilt Trip" - Los Angeles Premiere at Regency Village Theatre on December 11, 2012 in Westwood, California. Credit: Steve Granitz/WireImage.com

Prior to announcing their decision to split on Thursday, Feb. 21, Josh Brolin couldn't help gushing about Diane Lane in a press interview for his film Gangster Squad.

"She's a very strong woman, extremely strong," the 45-year-old actor admitted when the Entertainment Tonight host referred to Lane, who will play Martha Kent in upcoming Superman movie Man of Steel, as a "Woman of Steel."

On Thursday, the couple announced their decision to go their separate ways after eight years of marriage.

"Diane Lane and Josh Brolin have decided to end their marriage," reps for the couple told Us exclusively. The couple, who married in August 2004, parted ways a few months ago. They have no children together.

"It was a mutual decision. It is very amicable," a source tells Us. "It's not ugly, it's just over."

Both Brolin and Lane have previously been married -- Lane was married to actor Christopher Lambert (with whom she has a daughter, Eleanor) from 1988 to 1994, and Brolin was married to actress Alice Adair (with whom he has two kids, Trevor, 24, and Eden, 18).